General description
The LPC2141/42/44/46/48 microcontrollers are based on a 16-bit/32-bit ARM7TDMI-S CPU with real-time emulation and embedded trace support, that combine microcontroller with embedded high-speed flash memory ranging from 32 kB to 512 kB. A 128-bit wide memory interface and a unique accelerator architecture enable 32-bit code execution at the maximum clock rate. For critical code size applications, the alternative 16-bit Thumb mode reduces code by more than 30 % with minimal performance penalty.

Key features
■ 16-bit/32-bit ARM7TDMI-S microcontroller in a tiny LQFP64 package.
■ 8 kB to 40 kB of on-chip static RAM and 32 kB to 512 kB of on-chip flash memory. 128-bit wide interface/accelerator enables high-speed 60 MHz operation.
■ In-System Programming/In-Application Programming (ISP/IAP) via on-chip boot loader software. Single flash sector or full chip erase in 400 ms and programming of 256 bytes in 1 ms.
■ EmbeddedICE RT and Embedded Trace interfaces offer real-time debugging with the on-chip RealMonitor software and high-speed tracing of instruction execution.
■ USB 2.0 Full-speed compliant device controller with 2 kB of endpoint RAM. In addition, the LPC2146/48 provides 8 kB of on-chip RAM accessible to USB by DMA.
■ One or two (LPC2141/42 vs. LPC2144/46/48) 10-bit ADCs provide a total of 6/14 analog inputs, with conversion times as low as 2.44 µs per channel.
■ Single 10-bit DAC provides variable analog output (LPC2142/44/46/48 only).
■ Two 32-bit timers/external event counters (with four capture and four compare channels each), PWM unit (six outputs) and watchdog.
■ Low power Real-Time Clock (RTC) with independent power and 32 kHz clock input.
■ Multiple serial interfaces including two UARTs (16C550), two Fast I2C-bus (400 kbit/s), SPI and SSP with buffering and variable data length capabilities.
■ Vectored Interrupt Controller (VIC) with configurable priorities and vector addresses.
■ Up to 45 of 5 V tolerant fast general purpose I/O pins in a tiny LQFP64 package.
■ Up to 21 external interrupt pins available.
■ 60 MHz maximum CPU clock available from programmable on-chip PLL with settling time of 100 µs.
■ On-chip integrated oscillator operates with an external crystal from 1 MHz to 25 MHz.
■ Power saving modes include Idle and Power-down.
■ Individual enable/disable of peripheral functions as well as peripheral clock scaling for additional power optimization.
■ Processor wake-up from Power-down mode via external interrupt or BOD.
■ Single power supply chip with POR and BOD circuits:
   ◆ CPU operating voltage range of 3.0 V to 3.6 V (3.3 V ± 10 %) with 5 V tolerant I/O pads.